Communications grid tube _ Xiong Wang Thai (certified) _ Jiaxing grill pipe provided by Xiong Wang Thai Plastic Products Factory. Xiong Wang Thai Plastic Products Factory (www.wangtai668.com) is specialized in the "plastic tube, MPP power tube, CPVC pipe electricity, irrigation pipes, HDPE pipes, p" of the enterprise, the company of "honesty, hard service" concept, to provide you with the highest quality products and services. Welcome to inquire! Contact: Fengjing Li. Grill a complex soil pipe trench. When the backfill shall return grille tube filled mud, bricks and mud containing other miscellaneous hard objects. 2. When a project group with pipe laying grille tubes offer, each between pipes should be screened concrete backfill. 3. Inner tube top 150mm range, it is necessary to use artificial backfill grill pipe specifications, mechanical backfill prohibited. 4. The use of bulldozers rolling machine or vertical pressure or by the car load, complex soil thickness should not be less than the top tube construction of a 700mm aperture grille tube. Grille laying pipe and fittings must be certified operator, in strict accordance with regulate the construction of telecommunications grid tube, to prevent scratches, burns and other circumstances beyond occur. b. When the grill pipes with steel protection, steel nozzle should Yau Ma asphalt or otherwise blocked. When the stone grill pipe laying ditch, trail, at each shop pulverizer or 100mm thick sand.